How severe is CVE-2018-20771?

CVE-2018-20771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20771?

CVE-2018-20771 primarily affects Xerox Workcentre 3655i Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-20771 published?

CVE-2018-20771 was published on 2019-02-10 and last updated on 2026-06-17.

CVE-2018-20771

CVE-2018-20771 is a critical-severity vulnerability in Xerox Workcentre 3655i Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Xerox Workcentre 3655i Firmware
Published: 2019-02-10
Last modified: 2026-06-17

Description

An issue was discovered on Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX, 78XXi, 7970, 7970i, EC7836, and EC7856 devices before R18-05 073.xxx.0487.15000. There is unauthenticated Remote Command Execution.

Frequently asked questions

What is CVE-2018-20771?: An issue was discovered on Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX, 78XXi, 7970, 7970i, EC7836, and EC7856 devices before R18-05 073.xxx.0487.15000. There is unauthenticated Remote Command Execution.
How severe is CVE-2018-20771?: CVE-2018-20771 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20771?: CVE-2018-20771 primarily affects Xerox Workcentre 3655i Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-20771 published?: CVE-2018-20771 was published on 2019-02-10 and last updated on 2026-06-17.

References

https://securitydocs.business.xerox.com/wp-content/uploads/2018/07/cert_Security_Mini_Bulletin_XRX18Y_for_ConnectKey_EC78xx_v1.0.pdf

Affected products (29)

cpe:2.3:o:xerox:workcentre_3655i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_3655_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5890i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5865i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5875i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5845_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5865_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5875_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5890_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5900_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_5900i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_6655_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_6655i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7855_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7225_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7220i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7225i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7855i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7845i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7835i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7830i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7830_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7835_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7845_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7970_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_7970i_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_ec7836_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:xerox:workcentre_ec7856_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Xerox Workcentre 3655i Firmware

CVE-2016-11061 — Critical (CVSS 9.8): Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX, 78XXi, 7970, and 7970i devices…
CVE-2018-20770 — Critical (CVSS 9.8): An issue was discovered on Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX,…
CVE-2018-20768 — Critical (CVSS 9.8): An issue was discovered on Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX,…
CVE-2020-9330 — High (CVSS 8.8): Certain Xerox WorkCentre printers before 073.xxx.000.02300 do not require the user to reenter or validate LDAP bind…
CVE-2018-20767 — High (CVSS 8.8): An issue was discovered on Xerox WorkCentre 3655, 3655i, 58XX, 58XXi, 59XX, 59XXi, 6655, 6655i, 72XX, 72XXi, 78XX,…
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